401400424212 has 24 divisors (see below), whose sum is σ = 948456700800. Its totient is φ = 132106468416.

The previous prime is 401400424207. The next prime is 401400424219. The reversal of 401400424212 is 212424004104.

It is a super-2 number, since 2×401400424212² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401400424219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211708137 + ... + 211710032.

It is an arithmetic number, because the mean of its divisors is an integer number (39519029200).

Almost surely, 2^401400424212 is an apocalyptic number.

It is an amenable number.

401400424212 is an abundant number, since it is smaller than the sum of its proper divisors (547056276588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401400424212 is a wasteful number, since it uses less digits than its factorization.

401400424212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423418255 (or 423418253 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 401400424212 its reverse (212424004104), we get a palindrome (613824428316).

The spelling of 401400424212 in words is "four hundred one billion, four hundred million, four hundred twenty-four thousand, two hundred twelve".